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Sysadmin.lk
Free browser-based tools for fixing DNS, email, SSL and network problems.
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What you can do
Sysadmin.lk is a free toolkit for system administrators, developers and IT teams. Instead of reaching for dig, openssl or traceroute, you can run more than 85 checks in a browser. Start with the Super Scanner, which tests a domain and gives one score with a breakdown, then open the specific tool you need.
- A Super Scanner that scores a domain across DNS, email, website and security
- SPF, DKIM, DMARC, BIMI and MTA-STS checks, plus a deliverability test
- DNS records, propagation, WHOIS and DNSSEC
- SSL/TLS grading, CSR and key generation, and blacklist checks
- Ping, traceroute, port checks and a subnet calculator
- Scheduled domain monitors and a public JSON API
Who it's for
System administrators, developers and IT teams who need a quick answer when mail bounces, a certificate fails or a domain stops resolving.
Pricing
The diagnostic tools are free with no signup. A free account adds domain monitors and API keys.
Common questions
Do I need an account to use Sysadmin.lk?
No. The diagnostic tools work without signing up. You only need a free account for scheduled domain monitors and API keys.
Can Sysadmin.lk help when my email lands in spam?
Yes. Check your SPF, DKIM and DMARC records and run the deliverability test, which scores your setup from 0 to 10.
Related products
Part of SaaS services